Carburetor



June 10;, 1924.- 7 ,497 207 J. A. BOUILLON 4 CARBURETOR Filed Dec. 17 1919 /v VE/VTo/E;

Patented dune 10, 1924.

a awn CARBUBJETOR.

Application filed December 17, 1919.

To all whom it may concern Be it known that 1, Jonas ADRIEN BoUIL- LON, citizen of the Republic of France, residing at Bazoches en Houlme, Orne, in the Republic of France, have invented new and useful Improvements in Carburetors, of which the following is a specification.

This invention relates to improvements to carburetors of the kind wherein the spray nozzle is arrangedconcentrically with the float tank and consists of a carburetor of the aforesaid kind, the construction of which is very simple and adapted to be easily controlled and readily dismounted.

The annexed drawing shows by way of example in axial sectional elevation acarburetor constructed in accordance with the invention. 7

The body or outer casing of the carburetor comprises two hemispherical members name ly an upper member a constituting the top of the float tank and a lower member I) constituting the tank proper. These two members are removably secured together by means of a threaded construction.

The lower part b of the carburetor casing carries axially a cylinder 0. The fuel is contained in the annular chamber comprised between the inner surface of tank I) and the outer surface of cylinder 0. Said chamber contains the usual float (Z by means of which a constant level is obtained in tank 6. The float (Z, made of cork or any other suitable material, is pivoted on tank I) by means of a pin e and operates the shank f of the needlevalve controlling the inlet tube 9 through which fuel is supplied to the tank, said shank f resting upon a spring member f rigidly secured to the float. The valve casing g is carried by a plate 9 clamped between the two members a and b.

The fuel is supplied from the tank to the engine by suction through a horizontal conduit it having its inlet near the bottom part of tank I) and delivering fuel into an axial vertical conduit 7L which is closed at the bottom by a removable cap h and provided at the top with a transverse partition provided centrally with a small opening its. A. nozzle member 2' is mounted axially over said opening and constitutes the large sprayer of the carburetor.

The lower end of cylinder 0 is provided with an air inlet valve is pivoted to said cylinder and adapted to be closed for slow Serial No. 345,513.

running, holes being provided for the passage of air in closed position of said valve.

On the .top of cylinder 0 is screwed atubular member Z and on the top of the latter is screwed another tubular member on tapering upwardly and having lateral openings m A wire gauze o used for, facilitating the thorough mixing of the gases is clamped be tween the members Z and m.

Into the tapering part of the member at extends centrally the lower end of the ver tical tubular member an formed integrally with the top a of the casing, said member comprising an outer part projecting upwardly from the top of the casing and screwthreaded at'its upper end m for connection with the main suction pipe (not shown) leading to the engine. r

The member on carries axially by means of a spider m a vertical conduit 71 provided at its lower part with a restricted bore 0, the inlet end of which is placed over and at a small distance from the outlet opening of the nozzle 2'. sprayer and delivers fuel into conduit 11. The bottom wall of the latter extends and tapers downwardly so as to form a small casing 79 enclosing both the inlet of the small sprayer 0 and the outlet of the large sprayer i, said casing being provided with holes q opening into the suction pipe Z near the restricted part of a Venturi tube Z formed integrally with tube Z and at a level situated below the outlet of the sprayer 2'.

On the upper end of conduit or is slipped the lower end of a tube 7' which is bent laterally and then upwardly and opens into a horizontal conduit 8 provided in the lateral wall of the tubular member so thus constituting alow speed bypass.

A screw 6 acting as a plug permits of controlling the flow through the tube 0'.

A throttle-valve u having its pivot 'ubelow the outlet of conduit 3 is arranged in the outer part of the tubular member .70, said This bore 0 constitutes the small I throttle-valve being closed for slow running.

The throttle valve to is operatively connected to the air valve is, by any suitable means, not shown. An air inlet auxiliary valve 3 is provided for allowing additional air to be admitted in case of a very high suction taking place in the carburetor casing, this air passing through the holes m The suction of the engine is indicated by the arrow A and the normal entrance of air is indicated by the arron B Whereas, as above described, the fuel is admitted through the tube 9 to the float tanlr.

The operation is as follows:

During slow running, the valves u and is are closed. When the engine is on its suction stroke a vacuum is produced above the throttle 1/, and acts in the casing 22 through the medium of conduits a, tube 7, conduit n and projection O of the casing 7). Hence, a'

small quantity of air is sucked through the holes 9 into the casing 31 While a small quantity of fuel is sucked into the same from the tube it through the nozzle 2'. Said fuel is atomized by the air admitted through the holes 9 and the gaseous mixture passes up through the small sprayer 0, up through tube a, tube 1" and tube 8 and flows thence to the engine.

In normal running, both valves u and 70 being opened, a strong vacuum is produced directly in the cylinder 0; A jet of fuel issuing from the sprayer 2' strikes the inner faces of easing p, is sucked out of said casing through the holes 9 and is then carried up- Wardly and atomized by the air aspirated directly from outside through the open end of cylinder 0. The air and fuel are further mixed by the Wire gauze Q; on their way to the engine.

As clearly set forth in the above description With reference to the drawing, all parts of the improved carburetor including the Sprayers may be easily and rapidly taken into pieces by hand.

Having now described my invention, What I claim as new and desire to secure by here ters Patent is:

In a carburetor, the combination of a float tank, a main vertical suction pipe, having a restricted part, a throttle valve in said suction pipe, a fuel nozzle arrange-d axially in said suction pipe having its outlet orifice above the level of the fuel in the float tank, casing in Which the said fuel nozzle is adapted to extend and provided with an axial tubular projection having its lower orifice placed above and at a small distance from the outlet of said nozzle and means for connecting the upper orifice of said tubular projection to the said suction pipe above the said throttle valve, said casing being provided With lateral holes situated on a'loWe-r level than the outlet of the nozzle and opening into said restricted part of the suction pipe.

In testimony whereof I have signed my name to this specification.

JULES ADRIEN BOUILLON. 

